Is Car-Share a Friend or Foe to Environmental Concerns?

The Sierra Club has opposed an ordinance passed by the San Francisco Board of Supervisors that allows developers to add spaces above parking limits if they're dedicated to car-share vehicles. Does the plan violate the city's Transit First policy?

1 minute read

February 22, 2013, 1:00 PM PST

By Jonathan Nettler @nettsj


Isabel Angell reports on the recent Bay Area kerfuffle that pits environmentalists against car-share advocates. Proposed by Supervisor Scott Wiener, the plan that recently passed the board allows residential developers to "add more parking spots to their new apartment buildings–- if those spots are dedicated for car-share programs." 

While the ordinance passed unanimously, the outspoken opposition from the Sierra Club surprised some. "In a letter, Sierra Club secretary Sue Vaughan said the plan 'will add to overall congestion and negatively impact the flow of transit and air quality.'” The ordinance does seem to run counter to the city's aim of limiting the amount of parking allowed in new buildings.

"Instead of making new parking spots for car-share programs, The Sierra Club suggested converting existing street parking spots," adds Angell. "But Supervisor Wiener’s office countered by offering studies that show each new car share vehicle replaces between eight and ten private cars. In fact, a UC Berkeley study found that after signing up with a car-sharing program, almost half of households with a car got rid of their vehicle."

"The San Francisco Supervisors hope that developers will take advantage of these new car-share spots," she concludes. "So do the city’s car-share members, who are seeing their usual spots at gas stations and open-air lots disappear as they get converted into buildings and other uses."


Thursday, February 21, 2013 in Transportation Nation

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

June 11, 2025 - Diana Ionescu

Metrorail train pulling into newly opened subterranean station in Washington, D.C. with crowd on platform taking photos.

Congressman Proposes Bill to Rename DC Metro “Trump Train”

The Make Autorail Great Again Act would withhold federal funding to the system until the Washington Metropolitan Area Transit Authority (WMATA), rebrands as the Washington Metropolitan Authority for Greater Access (WMAGA).

June 2, 2025 - The Hill

Large crowd on street in San Francisco, California during Oktoberfest festival.

The Simple Legislative Tool Transforming Vacant Downtowns

In California, Michigan and Georgia, an easy win is bringing dollars — and delight — back to city centers.

June 2, 2025 - Robbie Silver

Color-coded map of labor & delivery departments and losses in United States.

The States Losing Rural Delivery Rooms at an Alarming Pace

In some states, as few as 9% of rural hospitals still deliver babies. As a result, rising pre-term births, no adequate pre-term care and "harrowing" close calls are a growing reality.

June 15 - Maine Morning Star

Street scene in Kathmandu, Nepal with yellow minibuses and other traffic.

The Small South Asian Republic Going all in on EVs

Thanks to one simple policy change less than five years ago, 65% of new cars in this Himalayan country are now electric.

June 15 - Fast Company

Bike lane in Washington D.C. protected by low concrete barriers.

DC Backpedals on Bike Lane Protection, Swaps Barriers for Paint

Citing aesthetic concerns, the city is removing the concrete barriers and flexposts that once separated Arizona Avenue cyclists from motor vehicles.

June 15 - The Washington Post